Electrionic accounting apparatus



July 4, 1950 A. H. DlcKlNsoN 2,514,035

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ELECTRONIC ACCOUNTING APPARATUS Filed Dec. 27,1943 19 Sheets-Sheet 17 ATTQRNEY July 4, 1950 A. H. DicklNsoN 2,514,035

ELECTRONIC ACCOUNTING APPARATUS Filed Dec. 27, 1943 19 sheets-sheet 18 FIG. 1.6.

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ELECTRONIC ACCOUNTING APPARATUS Filed DSG. 27, 1945 19 Sheets-Sheet 19 FIG. led. FIC. 17.

ATTORNEY Patented July 4, 1950 ELECTRONIC ACCOUNTING APPARATUS Arthur H. Dickinson, Greenwich, Conn., assignor .to International Business Machines .Corpora- Y., a corporation of New tion, New York, N. York Application December 27, 1943, Serial No. 515,719

14 Claims.

This invention is directed to `a novel electronic value totalizing and value manifesting apparatus. The general object of the invention is to provide an apparatus better and simpler than those disclosed in my former applications of Whichparticular note is to be taken of application Ser. No. 394,883, led May 23, 1941, now Patent No. 2,402,989 of July 2, 1946.

The latter application disclosed totalizing apparatus in which chosen entries were made in electronic entry receiving and totalizing orders by operating them for diierentialtimes of an entry cycle. Each order included a plurality of electronic trigger circuits for combinationally manifesting different digits of a notation. 'I'hese circuits were connected for progressive value registering operation in response to successive entry pulses. As many entry pulses were applied as the number of value increments in the digit to be entered; e. g., digit 9 was entered by applying nine entry pulses. The entry pulses were produced by electronic means which was rendered effective for a diierential part of the cycle to respond to continuously applied oscillator pulses. For rendering the entry pulsing means effective, an entry controlling trigger circuit was tripped from one status to another and back again by pulses derived from a continuously operating electronic commutator. Prior to an entry, a chosen value setting was made of value selecting means. Then a single entry cycle means was brought into operation to establish a delimited cycle during which a number of the continuously produced commutator pulses had differential time relationship. Two of the commutator pulses were transmitted to the entry controlling trigger circuit, the first pulse tripping it on to render the entry pulsing means effective and the second tripping it OIT to stop the entry pulsing operation. When a positive amount was chosen for entry in an order, the value setting transmitted the rst pulse at a diierential time, starting the entry pulsing operation. At a fixed time of the cycle, a second commutator pulse was fed to the entry control trigger circuit and interrupted the entry pulsing operation. The two `commutator pulses were separated by a 4,differential cyclic time which permitted the entry means to produce a number of pulses equal to the value selected for entry in the order. When a negative amount was to be en.- tered, subtraction control means was brought' into operation. During a subsequent entry cycle established by the single entry cycle means, a commutator pulse was fed to the entry'control trigger circuit at a fixed time of the cycle to initiate entry pulsing. `At a differential time selected by the value setting, a second commutator pulse was applied to the entry control trigger circuit and terminated entry pulsing. The result was the production of a number of entry pulses equal to the complement of the value chosen for subtractive entry. Elusive one means was operated under control of a commutator pulse at a xed time'oi the cycle, during a subtractive entry. Carry means were provided between adjacent orders'of the value manifesting units. The carry means between two orders was pulsed insynchronism with the entry pulsing of the lower of the two orders. When such lower order attained a 9 value status, it prepared the carry means to operate in response to the next carry control-pulse. Collaterally with the entry pulsing of the lower order to advance it from 9 to 0 value status, va carry control pulse operated the carry means which acted through other than'the'regular entry means of the next order to enter a carry value therein. Special carry through means was provided to produce a carry entry in a second higher order when the first higher order was in 9 value status at the time it received a carry entry from its preceding order. The totals standing in the accumulator orders were indicated in digit outline form byl cathode ray tubes. Control of each cathode ray tube was effected by a related order of the value totaling means through a plurality of `electronic relays. Each relay was selectively operated under control of a combinational read-out circuit established by a composite digit manifesting pattern of the electronic value manifesting means of the order. When a particular digit was manifested,

an electronic relay was operated and enabled the in my prior application. Ser. No. 394,883 will aid in an appreciation of some of the objects which arestated below.

The present electronic totaling apparatus requires no continuously operating electronic commutator but utilizes a start-stop electronic commutator, the principles of which are claimed in my copending application Ser. No. 584,463, filed ditions at the diierent points ofthe commuta.-y 

